Explaining Uninterruptible Power Supply (UPS)

An uninterruptible power supply (UPS) provides instantaneous power when the main utility power source fails, allowing time for the power to return or for the user to shut down the system or equipment by closing running computer system applications and using the operating system to shut down the system.

The user has between five and fifteen minutes to shut down a system normally or bring an auxiliary power source online to restore the power supply. Also, most UPS systems work to address power source electrical surges, sag voltage, voltage spikes, frequency instability, noise interference or harmonic distortion from the ideal sinusoidal waveform.

A UPS is not limited by equipment type and ensures uninterruptible power to computers, data centres or other electrically powered equipment during an unexpected power failure. To find out about the latest UPS devices visit https://www.pantherdata.com.au/Script/MCH/Products/888334-Eaton-PW9130G1000T-XLAU-EATON-Powerware-91.

UPS units can vary depending on the equipment size, ranging from a single computer to entire data centres, buildings or cities. When sensing normal power fluctuations or interruptions, a UPS may automatically activate backup systems to ensure that data is not lost. Many technologies are employed to help increase the effectiveness of modern UPS systems, including:

Offline Standby:

It restores power when standard power fails by using an inverter output that is less than half a second.


Ensuring power for five to thirty minutes and up to several hours with expansion, by using a multi-tap, variable-voltage autotransformer, which immediately adds or subtracts the transformer’s output voltage.

Double-Conversion Online:

This is similar to line-interactive, apart from that a rectifier directly drives a DC/AC inverter, even when the normal current powers it. However, this can be typically a high-cost option.

UPSs can monitor their status as battery charge and readiness to perform and report deficiencies or issues to the protected computer via a serial port, Ethernet or USB connection.

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